Bern
Switzerland
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Bern, Switzerland

Bern, Switzerland, in a striking aerial panorama of the leafy landscape, beautiful blue waters, and the city buildings
Bern, Switzerland, in a striking aerial panorama of the leafy landscape, beautiful blue waters, and the city buildings
The first month of the autumn, September, is also an enjoyable month in Bern, Switzerland, with average temperature fluctuating between 19.1°C (66.4°F) and 8.9°C (48°F).

Temperature

In September, the average high-temperature marginally drops, from a warm 23.7°C (74.7°F) in August, to an enjoyable 19.1°C (66.4°F). The average low-temperature, in Bern, is 8.9°C (48°F).

Humidity

In Bern, the average relative humidity is 79%.

Rainfall

In Bern, it is raining for 8.9 days, with typically 99mm (3.9") of accumulated precipitation. In Bern, during the entire year, the rain falls for 124.2 days and collects up to 1059mm (41.7") of precipitation.

Snowfall

In Bern, Switzerland, in September, it doesn't snow. In October, it regularly snows. Throughout the year, 526mm (20.7") of snow is accumulated.

Daylight

The average length of the day in Bern is 12.5h.

Sunshine

In September, the average sunshine in Bern is 5.5h.

UV index

In September, the average daily maximum UV index in Bern is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to the Sun's UV rays for average individuals.
The daily maximum UV index of 5 interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in September in Bern?

In September, in Bern, Switzerland, the average high-temperature is 19.1°C (66.4°F), and the average low-temperature is 8.9°C (48°F).

What is the average humidity in September in Bern?

In September, the average relative humidity is 79%.

How much does it rain in Bern in September?

In Bern, during September, the rain falls for 8.9 days and regularly aggregates up to 99mm (3.9") of precipitation.

Does it snow in Bern in September?

In Bern, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Bern have in September?

In Bern, the average length of the day in September is 12.5h.

How long on average sun shines in September in Bern?

In Bern, Switzerland, the average sunshine in September is 5.5h.

How high is the UV index in September in Bern?

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health risk from the exposure to the Sun's UV rays.
Average temperature in September - Bern, Switzerland
  • Average high temperature in September: 19.1°C

The warmest month (with the highest average high temperature) is July (24.3°C).
The month with the lowest average high temperature is January (2.8°C).

  • Average low temperature in September: 8.9°C

The month with the highest average low temperature is July (12.5°C).
The coldest month (with the lowest average low temperature) is January (-3.6°C).

Average humidity in September - Bern, Switzerland
  • Average humidity in September: 79%

Months with the highest relative humidity are November and December (85%).
Months with the lowest relative humidity are April, June and July (71%).

Average rainfall in September - Bern, Switzerland
  • Average rainfall in September: 99mm

The wettest month (with the highest rainfall) is May (119mm).
The driest month (with the lowest rainfall) is February (55mm).

Average rainfall days in September - Bern, Switzerland
  • Average rainfall days in September: 8.9 days

The month with the highest number of rainy days is May (12.6 days).
The month with the lowest number of rainy days is September (8.9 days).

Average snowfall in September - Bern, Switzerland
  • Average snowfall in September: 0mm

The month with the highest snowfall is December (133mm).
Months with the lowest snowfall are May, June, July, August and September (0mm).

Average snowfall days in September - Bern, Switzerland
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (4.1 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

Average daylight in September / Average sunshine in September - Bern, Switzerland
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.8h).
The month with shortest days is December (Average daylight: 8.6h).

  • Average sunshine in September: 5.5h

The month with most sunshine is July (Average sunshine: 7.6h).
The month with least sunshine is December (Average sunshine: 1.6h).

Average UV index in September - Bern, Switzerland
  • Average UV index in September: 5

Months with the highest UV index are June and July (UV index 8).
Months with the lowest UV index are January, November and December (UV index 1).